Core Animation的基本使用(三)

實驗Layer基本的動畫效果，利用CATransaction 的setDisableActions來做動畫的開關。

以下是實作

1. 首先開啓一個專案

2. 在StoryBoard加入六個Button及一個Switch，來顯示動畫的效果

3. 先加入 QuartzCore Framework

4. 在mainViewController.h註冊一個Layer，另外還有Switch作為開關

#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>

@interface mainViewController : UIViewController

@property (weak)   CALayer *layer;
@property (weak, nonatomic) IBOutlet UISwitch *actionsSwitch;
@end

5. 在mainViewController.m加上Layer的程式碼

#import "mainViewController.h"

@interface mainViewController ()

@end

#define ORGINAL_POSITION CGPointMake(500, 300)
#define MOVED_POSITON CGPointMake(300, 500)

@implementation mainViewController

@synthesize layer, actionsSwitch;

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
   
    layer = [CALayer layer];
    layer.bounds = CGRectMake(0, 0, 200, 200);
    layer.position =  ORGINAL_POSITION;   ///CGPointMake(500, 300);
    layer.backgroundColor = [UIColor redColor].CGColor;
    layer.borderColor = [UIColor blackColor].CGColor;
    layer.opacity = 1.0f;
    [self.view.layer addSublayer:layer];
   
    actionsSwitch.on = NO;

}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (IBAction)toggleCorner:(id)sender {
    [CATransaction setDisableActions:actionsSwitch.on];
    layer.cornerRadius = (layer.cornerRadius == 0.0f) ? 30.0f : 0.0f;
}
- (IBAction)toggleColor:(id)sender {
    [CATransaction setDisableActions:actionsSwitch.on];
    CGColorRef redColor = [UIColor redColor].CGColor, blueColor = [UIColor blueColor].CGColor;
    layer.backgroundColor = (layer.backgroundColor == redColor) ? blueColor : redColor;
}
- (IBAction)toggleOpacity:(id)sender {
    [CATransaction setDisableActions:actionsSwitch.on];
    layer.opacity = (layer.opacity == 1.0f) ? 0.5f : 1.0f;
}
- (IBAction)togglePosition:(id)sender {
    [CATransaction setDisableActions:actionsSwitch.on];
    layer.position = layer.position.x == 500 ? MOVED_POSITON : ORGINAL_POSITION;
}
- (IBAction)toggleBorders:(id)sender {
    [CATransaction setDisableActions:actionsSwitch.on];
    layer.borderWidth = (layer.borderWidth == 0.0f) ? 10.0f : 0.0f;
}
- (IBAction)toggleBounds:(id)sender {
    [CATransaction setDisableActions:actionsSwitch.on];
   
    if (layer.bounds.size.width == layer.bounds.size.height)
        layer.bounds = CGRectMake(layer.bounds.origin.x, layer.bounds.origin.y, layer.bounds.size.width + 100, layer.bounds.size.height);
    else
        layer.bounds = CGRectMake(layer.bounds.origin.x, layer.bounds.origin.y, layer.bounds.size.width - 100, layer.bounds.size.height);
}
@end



6. 執行結果